Questions on UI for WinForms Forum

5 answers

861 views

[Solved] can't find ExportToExcelML method

I am using RadControls for WinForms Q2 2010 SP2

I tried to use gridview to export data to Excel.

I have following namespaces:

Imports

Telerik.WinControls

Imports

Telerik.WinControls.UI

Imports

Telerik.WinControls.UI.Export

Imports

Telerik.WinControls.Data

But I can't get ExportToExcelML method to come up when I code

Dim

exporter As ExportToExcelML = New ExportToExcelML(Me.gridview)

Did I miss anything?

GridView

answered on 13 Oct 2014

1 answer

77 views

Reflecting Custom Object Changes in RGV Hierarchy

Hi,

I am using the hierarchy feature of the data grid. My data consist of two custom objects one composed of the other.

class MyClassA : INotifyPropertyChanged

{

String Porperty1 {get; set;}

BindiingList<MyClassB> Items {get; set;}

//...

}

class MyClassB : INotifyPropertyChanged{

String Property1 {get; set;}

int Property2{ get; set;}

//...

}

(My actual classes invoke the PropertyChanged event. I did not show the full setters here for simplicity.)

I am setting a BindingList<MyClassA> as the data source for the grid view. I understand from this post here that you must handle the change event on the data grid when using the hierarchy view. I did this below:

private void dataGrid_CellValueChanged(object sender, GridViewCellEventArgs e)

{

//if the column is from the child view we must handle the change to the data model directly

if(e.Column.OwnerTemplate == gridViewTemplate1)

{

var b = e.Row.DataBoundItem as MyClassB;

var property = typeof(MyClassB).GetProperty(e.Column.FieldName);

property.SetValue(b, e.Value, null);

}

This works for updating the data model when changes are made to the UI. How do I see changes reflected in the UI when changes are made to the model?

GridView

answered on 10 Oct 2014

3 answers

162 views

Grid is not saving layout when columns are grouped

We allow our users to reorder columns. Everything works when there is no grouping. I looked at xml layout and columns are saved in order they appear on screen.
But when we create groups programmaticaly the saved layout is always the same. Even if I reorder groups xml layout save doesn't change.
I tried to modify it by hand and reload and it worked. I moved columns of groups in and they appeared in modified order on screen.

One solution is to modify layout returned by grid to make it in line with order of groups on screen and then save it. But I don't like it.

I'm using Version=2012.1.321.20

GridView

answered on 10 Oct 2014

3 answers

241 views

[Solved] FullRowSelect disable

Hi,

I'm trying to disable to fullrowselect in a ListView with detail as its viewtype and thereby only have a one or more cells selected.
Please see the code below:

public partial class ListViewFullRowSelect : Form

{

public ListViewFullRowSelect()

{

InitializeComponent();

radListView1.ViewType = Telerik.WinControls.UI.ListViewType.DetailsView;

radListView1.FullRowSelect = false;

List<Test> testList = new List<Test>();

Random r = new Random();

for (int i = 0; i < 500; i+=3)

{

int nextvalue = r.Next(10)+1;

testList.Add(new Test(i, i + " times " + nextvalue+ " = " + i * nextvalue));

}

radListView1.DataSource = testList;

}

public class Test

{

public int id { get; set; }

public string result { get; set; }

public Test(int id, string name)

{

this.id = id;

this.result = name;

}

Is what i'm trying to do possible or does it conflict with the whole idea of listview?

Regards,
Thomas

ListView

answered on 09 Oct 2014

8 answers

249 views

[Solved] Problems with shortcuts in RadRichTextbox

Hi.

I'm a little new in telerik controls, but i have a problem with RichTextbox. When I try to type letter 'ą', which is combination of keys Alt + a, the text in control is selected but I have not the letter 'ą' in my control. Is there any possible to disable shortcuts in RichTextBox ?
Thanks for the response.
Best regards
Lukasz

RichTextBox (obsolete as of Q3 2014 SP1)

answered on 09 Oct 2014

1 answer

111 views

[Solved] Create Filtered Dataset from Filtered RadGridView

Is there any way to take a filtered RadGridView and create a corresponding dataset that can be passed to a Telerik report? How do I even get to the filter expression for the GridView? I have found examples of how to get the filter expression on a RadGrid but not a RadGridView. Thanks.

GridView

answered on 08 Oct 2014

1 answer

1.8K+ views

[Solved] Memory Leak after disposing a dialog?

Hi

( Please if I'm wrong with my understanding of this rectify me )

Reading about good and bad programming practices I heared that when calling a ShowDialog method (at least in a normal Windows.Form) that Form is not disposed after the DialogResult is sent, the Form remain in memory so it will be disposed manually, well, then following that good practices that is was I'm trying to do with a RadForm, this is the code:

If ConfigureCorner.ShowDialog() = Windows.Forms.DialogResult.OK Then

Telerik.WinControls.RadMessageBox.Show(Me,

"Action applied",

Me.Name,

MessageBoxButtons.OK,

Telerik.WinControls.RadMessageIcon.Info)

End If

ConfigureCorner.Dispose

The problem is that every time that I call ShowDialog after the Form is disposed for first time the memory increases like 5-10 mb each time, and it needs much execution time to display the Form and its controls.

I attached an image to show the Form contents, but his is the detailed content of the RadForm:

· 3 different themes

· 15 RadButtons
· 5 RadCheckBoxes
· 1 RadDropDownList
· 8 RadGroupBoxes
· 21 RadLabels
· 1 RadPageView
· 12 RadPageViewPages
· 2 RadRadioButtons
· 12 RadSeparators
· 8 RadTextBoxControls

· 2 Custom dialogs for open folder/files.

As you see seems that I'm not using anything special that should 'cause this memory leak,
the images of the controls are set directlly in the designer property grid as 'Image' property,
I'm not loading or instancing any disposable object before closing the RadForm.

Also, I'm trying to force garbage collecting aftear each call to Dispose method after calling ShowDialog, but that does not solve anything:

GC.Collect()

GC.WaitForPendingFinalizers()

GC.WaitForFullGCApproach()

GC.WaitForFullGCComplete()

GC.Collect()

This is normal?

Any information will be very appreciated, thanks in advance.

Form

answered on 08 Oct 2014

9 answers

344 views

[Solved] Adding row to empty grid

Hi, I have one problem with Telerik Grid View (version 2014.2.617.40).
I set list with several items as DataSource for GridView and user can add new items by clicking on "Click here to add a new row". But if all items were removed from list this row disappear. Only text "No data to display" is showed.

My collection defined as

ItemsCollection<T> : IBindingList, IList<T> where T : Item

{}

After initialization of list user have empty list and cannot add first row. How I can change this behavior?

Thanks.

GridView

answered on 08 Oct 2014

3 answers

374 views

[Solved] Stop grid auto-scroll asynchronous threading

Hey Admin,

I have once scenario I am binding records via asynchronous threading

delegate void RuleResultParameterDelegate(string value); // this delegate is used to allow the code to call back to itself, as needed in the UI thread

private void RuleExecuted(string ruleResult)

{

// if this is not the main UI thread, then call this function via a delegate

if (InvokeRequired)

{

BeginInvoke(new RuleResultParameterDelegate(RuleExecuted), new object[] { ruleResult });

return;

}

GridViewRowInfo row = new GridViewRowInfo(radGridView_EnvResults.MasterView);

row.Cells["colTargetHost"].Value = “abc”;

row.Cells["colRuleName"].Value = “efg”;

var selectedRow = radGridView_EnvResults.CurrentRow;

radGridView_EnvResults.Rows.Add(row);

if (selectedRow != null)

{

radGridView_EnvResults.GridBehavior = new MyBehavior();

}

} public class MyBehavior : BaseGridBehavior

{

public override bool ProcessKey(KeyEventArgs keys)

{

if (this.GridControl.CurrentRow is GridViewNewRowInfo)

{

if (keys.KeyData == Keys.Enter || keys.KeyData == Keys.Down || keys.KeyData == Keys.Up)

{

this.GridControl.EndEdit();

this.GridControl.GridNavigator.SelectPreviousRow(1);

this.GridControl.GridNavigator.SelectFirstColumn();

this.GridControl.BeginEdit();

}

else if (this.GridControl.GridNavigator.IsLastColumn(this.GridControl.CurrentColumn) && keys.KeyData == Keys.Tab)

{

this.GridControl.EndEdit();

this.GridControl.GridNavigator.SelectPreviousRow(1);

this.GridControl.GridNavigator.SelectFirstColumn();

this.GridControl.BeginEdit();

}

else if (keys.KeyData == Keys.Tab)

{

this.GridControl.GridNavigator.SelectNextColumn();

}

return true;

}

else

{

return base.ProcessKey(keys);

}

Is there a way to not have the grid auto-scroll as data is going into it?

Thanks,
Shakti

GridView

answered on 08 Oct 2014

2 answers

165 views

Images not showing in DetailView mode

Hi,

I've just upgraded a project to the 2014.2 715 release and have noticed that item images are now not being displaying in RadListView when the list is in DetailView mode. I've confirmed that the difference exists in the FileExplorer demo app between versions 2013.3 1016 and 2014.2 715 (run both demos and switch both into Detail view mode - the right-hand listview showing files shows file type icons in the 2013 version but not in the 2014 version - see attached screenshot). Is there any way of restoring the image behaviour in the latest release without having to workaround with a separate image column?

Best regards,

Frazz

ListView

answered on 07 Oct 2014